Braking device for elevator traction sheave

Abstract

The invention provides a braking device of an elevator traction wheel, and belongs to the elevator safety protection device. The braking device comprises a brake device, a spring device and a spring compressing mechanism; the brake device comprises a first brake seat equipped with a first brake shoe, and a second brake seat equipped with a second brake shoe; the spring device is connected to the brake device; the spring compressing mechanism comprises a gear-belt transmission device; when the brake device brakes, a spring in the spring device is released from a compressed state to drive the first brake seat and the second brake seat to oppositely move, and then the first brake shoe and the second brake shoe are close to each other to clamp the traction wheel; when the brake device releases, the gear-belt transmission device compresses the spring in the spring device under the effect of a force, and thereby the first brake seat and the second brake seat move oppositely, the first brake shoe and the second brake shoe move away from each other to release the traction wheel, and the spring in the spring device is locked into a compressed state through the spring compressing device. The braking device of the elevator traction wheel has the advantages that the structure is compact, the size is small, the braking effect is good, the operation is convenient and convenient, and the service life is long.

Description

technical field [0001] The invention belongs to the technical field of safety protection devices for elevators, and in particular relates to a braking device for emergency stopping of the traction sheave of an elevator traction machine when the elevator car is in an abnormal running state. Background technique [0002] Modern elevators are mainly composed of traction machines (winches), guide rails, counterweight devices, safety devices (such as speed governors, safety gears and buffers, etc.), signal control systems, cars and hall doors. These parts are respectively installed in the hoistway and machine room of the building. Steel wire rope friction transmission is usually used. The wire rope goes around the traction sheave, and the two ends are respectively connected to the car and the counterweight. The motor drives the traction sheave to lift the car up and down. Elevators require safety and reliability, high conveying efficiency, accurate leveling, and comfortable ride...

AI Technical Summary

Problems solved by technology

Although the brake device is not mechanically touched, the structure is relatively simple, but the brake device is an electromagnetic drum brake. When the traction sheave is released, if enough electromagnetic force is to be generated to overcome the braking force of the brake traction sheave, then The electromagnet is required to be large enough, and the gap between the two sides of the traction sheave and the brake skin is small enough and parallel, so that a large electromagnetic force can be generated between the moving and static iron cores, so the emergency braking device must have a large volume and high installation accuracy. and the disadvantages of harsh installation conditions

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